facebook share on page you manage in asp.net mvc

i am trying to share product details in facebook from our website in asp mvc, i used feed dialog and it works fine, but i need and additional options in feed dialog to share on page you manage

feed dialog

<a href="http://ift.tt/1GItQ27" target="_blank"><div style="width:60px;float:left;"><img style="text-align:center" src="@Url.Content("~/image/fbshare.jpg")" alt="fbshare" /></div></a>

didn't work, so i tried sharer.php

<a target="_blank" href="http://ift.tt/1NySSRe"><div style="width:60px;float:left;"><img style="text-align:center" src="@Url.Content("~/image/fbshare.jpg")" alt="fbshare" /></div></a>

but when i share using sharer.php it shares my site login Page, our product site is login based, users can view all products , but when they click buy , they have to login to proceed further.

i dont know, why does facebook share my login Page instead of product details ?

How can i provide options like share on page you manage, timeline , friends etc ?

its been hours, i couldn't find any solution still, any help would be great.